Canon A-1 Instructions Manual page 56

shutter speed. lf your lens has a smaller
minimum aperture, exposure will be correct.
Outside the .\.1eter Coupling R ange
When the light level is so low that it would
be outside the meter coupling range re-
gardless of the shutter speed you set, the set
shutter speed
will
flash on and off along
with the aperture in the viewfinder. When
the ligh t level is too high , a small aperture
will flash on and off even when the AT dial
is set to the highest shutter speed. In these
cases, shooting in the shutter priority
AE mode is only possible if you can change
the light level accordingly or switch to a
m ore appropriate film.
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2. In aperture priority AE mode
When exposure is incorrect, the
LED
digital
readout for shutter speed Dashes on and off.
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When the highes t shutter speed of 1000
flashes in the viewfinder to indicate over-
exposure, turn the AT dial to a smaller
aperture. When a shutter speed of the slow
range flashes in the viewfinder to indicate
underexposure, turn the AT dial to a larger
aperture. The shutter speed value that flash-
es to indicate underexposure depends on the
speed (maxi mum aperture) of t he lens and
ASA film speed.
As
in the shutter priority AE mode,
when
the light level is too low, b oth shutter
speed and aperture data will flash on and off
to indicate that no matter w hat aperture you
set, the meter will not couple in an AE
mode. When the light level is too high, the
shutter speed
will
flash on and off even
when the AT dial is set to the minimum
aperture possible. Again, AE photography is
still possible if yo u change the light level
or switch to a more appropriate film.
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